Display roaming

app/src/main/java/eu/faircode/netguard/ActivityMain.java

@@ -196,7 +196,10 @@ public class ActivityMain extends AppCompatActivity implements SharedPreferences
             Log.i(TAG, "Received " + intent);
             Util.logExtras(TAG, intent);
             if (menuNetwork != null)
-                menuNetwork.setIcon(Util.isWifiActive(ActivityMain.this) ? R.drawable.ic_network_wifi_white_24dp : R.drawable.ic_network_cell_white_24dp);
+                menuNetwork.setIcon(
+                        Util.isWifiActive(context) ? R.drawable.ic_network_wifi_white_24dp :
+                                Util.isRoaming(context) ? R.drawable.ic_network_cell_white_24px_roaming :
+                                        R.drawable.ic_network_cell_white_24dp);
         }
     };
 
@@ -316,7 +319,10 @@ public class ActivityMain extends AppCompatActivity implements SharedPreferences
     public boolean onPrepareOptionsMenu(Menu menu) {
         SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this);
 
-        menu.findItem(R.id.menu_network).setIcon(Util.isWifiActive(this) ? R.drawable.ic_network_wifi_white_24dp : R.drawable.ic_network_cell_white_24dp);
+        menu.findItem(R.id.menu_network).setIcon(
+                Util.isWifiActive(this) ? R.drawable.ic_network_wifi_white_24dp :
+                        Util.isRoaming(this) ? R.drawable.ic_network_cell_white_24px_roaming :
+                                R.drawable.ic_network_cell_white_24dp);
 
         menu.findItem(R.id.menu_whitelist_wifi).setChecked(prefs.getBoolean("whitelist_wifi", true));
         menu.findItem(R.id.menu_whitelist_other).setChecked(prefs.getBoolean("whitelist_other", true));

app/src/main/java/eu/faircode/netguard/Util.java

@@ -13,6 +13,7 @@ import android.os.Bundle;
 import android.os.Handler;
 import android.os.Looper;
 import android.os.PowerManager;
+import android.telephony.TelephonyManager;
 import android.util.Log;
 import android.widget.Toast;
 
@@ -34,6 +35,11 @@ public class Util {
         }
     }
 
+    public static boolean isRoaming(Context context) {
+        TelephonyManager tm = (TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE);
+        return tm.isNetworkRoaming();
+    }
+
     public static boolean isWifiActive(Context context) {
         ConnectivityManager cm = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
         NetworkInfo ni = cm.getActiveNetworkInfo();